If you're saying evos don't consider duplications and reordering kinds of mutation then you're very wrong as is evident here.
If magic beams from the mother ship were found to be a "cause" you'd find evolutionists claiming that this, too, was mere "mutation".
Right up to the time the lady got the Nobel for her discovery of "jumping genes" the word "mutation" meant something very specific ~ namely, the transformation of an existing gene with specific coding into a different gene.
I'm sticking to the old definition. That way words will continue to have meanings that facilitate communication.